/*
 * Copyright (c) 2011, Nikolaus Moll
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * * Neither the name of the gradecalculator.net nor the
 *   names of its contributors may be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
package net.gradecalculator.gui.qt.editor.dialogs;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import net.gradecalculator.core.GCCore;
import net.gradecalculator.plugin.core.interfaces.IRegulationsPlugin;

import com.trolltech.qt.gui.QComboBox;
import com.trolltech.qt.gui.QFileDialog;
import com.trolltech.qt.gui.QGridLayout;
import com.trolltech.qt.gui.QLabel;
import com.trolltech.qt.gui.QWidget;

public class FileRegulationsDialog extends QFileDialog {
	
	private final QComboBox cbPlugins;
	private final List<IRegulationsPlugin> plugins;
	private IRegulationsPlugin plugin;
	
	public FileRegulationsDialog(final QWidget parent, final String caption) {
		super(parent, parent.tr(caption));
		setViewMode(ViewMode.List);
		setFileMode(QFileDialog.FileMode.ExistingFile);
    	final QGridLayout layout = (QGridLayout)layout();

    	cbPlugins = new QComboBox();
    	cbPlugins.currentIndexChanged.connect(this, "eventCurrentIndexChanged(int)");
    	plugins = GCCore.getReglationsPlugins();
    	for (final IRegulationsPlugin p : plugins) {
    		final String text = p.getName() + " (" + p.getVersion() + ")";
    		cbPlugins.addItem(text);
    	}

   		layout.addWidget(new QLabel("Used plugin:"));
   		layout.addWidget(cbPlugins);
	}
	
	private String createFilterString(final IRegulationsPlugin plugin)
	{
		//"Images (*.png *.xpm *.jpg);;Text files (*.txt);;XML files (*.xml)"
		final StringBuilder result = new StringBuilder();
		
		String separator = "";
		for (final String description : plugin.getLoadableFileExtensions().keySet()) {
			result.append(separator + description + " (");
			final List<String> extensions = plugin.getLoadableFileExtensions().get(description);
			String fileSeparator = "";
			for (final String extension : extensions) {
				result.append(fileSeparator + "*." + extension);
				fileSeparator = " ";
			}
			result.append(")");
			separator = ";;";
		}
		
		return result.toString();
	}

	protected void eventCurrentIndexChanged(final int index)
	{
		plugin = plugins.get(index);
		this.setFilter(createFilterString(plugin));
	}
	
	public IRegulationsPlugin getPlugin()
	{
		return plugin; 
	}
}
